Key Takeaways
- Clinical Bottom Line
- Macroscopic Clip Systems for Defect Closure
Clinical Bottom Line
| Device System | Clip Design | Specific Advantages |
|---|---|---|
| Ovesco OTSC | Bear-trap hinge design (Nitinol). | Exceptional compressive strength; dedicated twin-graspers available. |
| Padlock Clip | Star-shaped 360-degree radial closure (Nitinol). | Even distribution of radial tissue compression; push-button deployment. |
| Through-the-Scope (TTS) | Linear approximation. | Fits down the channel instantly; weak against indurated tissue. |
Macroscopic Clip Systems for Defect Closure
Full-thickness endoscopic defect closure is governed by cap-mounted macroscopic clips. While the OTSC system is historically dominant, the newer Padlock Clip offers alternative deployment mechanics. Rather than a hinged jaw, the Padlock utilizes a star-shaped, six-pointed nitinol ring that contracts circumferentially upon deployment, bunching the aspirated tissue into a tight, secure star-burst pattern.
Comparative Clinical Utilities
Push-button deployment associated with the Padlock clip eliminates the need for hand-crank rotary systems, simplifying the ergonomic workflow for the endoscopist. However, OTSC retains an advantage in highly fibrotic chronic fistulas where rigid twin-graspers are required to physically drag the margins into the chamber. Proper pre-procedural sizing of the endoscope cap relative to the diameter of the working gastroscope/colonoscope is critical for both platforms.
Clinical guidelines summarized by the Gastroscholar Research Team. Last updated: 2026. This article is intended for physicians.
